Fig ll



R. H. FEWSTER.

LOCK NUTI APPLICATION FILED FEB. 28. l9l8.

1,317,567. Patentedsept. 30, 1919.

FIGS FIGII FlGl A from/E is LociriNUT.

Appntatih mea retrar-yf'zs, 191s. serial No; zrage? Tol all cli/tommag/fconcem':

Be it known that I; RoBERr'I-Ionwoon FEW- s'rnn, a'subjectofcthe Kingoi' GrIeat'Britain,

and resident of/Darkan5 in the; State of' Kestern` AustraliagCommonwealth of `Ai1sl tralia, haveiinventedfcertaln 'new and usefullImprovements in Lock-Nuts, of which the following is a splecilication.`

This invention relates to improvedmeans' for" effectively securing andadjusting-bolts and'nutsand; like deviceson parts of ma.`

The invent-ion aordsrmeansf for' preventing the; rotatio'nof a bol-t orloosening-oa nut.

The invention comprises cap washer designed and adaptedto effectuate theforfe-VM going purpose,v whilethe capv washer and; parts are constructedin such); amanner that theyv can be used continually and perpetually',Athe partsl notl beingl` destroyed by changing operations. My devicediffers-- in this respect nfrom other locking devices the nearest tofit'nsnnilarityso:V -far as I ami The capvwasher` 1s of such'varied'aware. shapea'ndconstructionA that 1t its'overl or on and off` thenutand is-adapted to clutch `the same.The capA washer-` is furnished.,interiorly with either 1 aV lug fitting into ja groove-lengthwiseoftheboltgjor the washer is constructed-with a barVeXtending-from one ofits sides diametrically to the opposite side4 and itting'jinto a slotyacross` the centerV of the bolt correspondinggwiththe said bar; vor

the bolt is providedwith a tattened or media fied` portion or portions'which correspondportion or. portions. of

and cofactjwlithvlike thecap washer. y

This device secures practicallythe positive immobility ofadjusted nuts.It also allows of most perfect adjustment from.v time to time-,t0 anydegree 0f ,neness It CM1 be used in allpositions where nuts andthe likeare requireda-ndcanbe easilyapplied while' it` enables greaterVconvenience and security to be obtained. l, Y

Embodiment with modication of' forms of' the invention "may beidesc'ribed'las. fol

lows: A' cap washer which is a combination ofi awasherextendedtotheformo acap'zisu formed ofdurable suitable materialgsuch preferablyy springsteel. lIn ione form thefc'ap! washer has extended".flange; lugs.-ywhiclrgt into radial slots or faces on the nut.;l 'I'wov of' these:lugs' are` prolonged and? curved downward (-nieaning'inrline withfth'e'lengtlr of' the Ybolt.) and inwardfatornear"thein'ends-l` so that theycan slide down the sides orda'cesfv ofthe nut wliere'they slipinto'anappro'irimately annular groove or rec'ess onreducedi portion therebysecuningzthef cap: washerj 'on ther nut; rIt' can be readily? removed;by .in-

serting: the. ends :ofiflat tongs under? th'elugs and so slipping thecap off. InorderrxtoY prevent the`- nutV with'V the* described?orsimilar attachmentsy from'slackening,l afzkey wa'jr is cut throughthev topor'alongvthe'boltgfa tongue or lug l being; provided* on thenin.

terior of the cap washer, such tongueorlug" being bent to followthecourse ofthe-fkejf way for such distance inwardiaslis advisable.vaccording'to 'the diameterfof th'e bolt;

In, another form ot'. the invention, the 80 washer is square orflateither` ont one-.or morel of its sides a correspondingsquaringj orflattening (which may-.be by Iecessing being provided in the` bolt. OrasV` another,

modification ay slot-'is provided' in th'e-end-'ov 85 the bolt andabara-crossfthe;l diameter of:y the capV washer. The: Word bol'tl in?Athis,l speciication is intended to describeafbolt with yheadfat onev endand; ascnew; threaded portion `at-the other endfprepared to receive anutand the b'olt and nut arel used for' the. purpose ofj securinff andadjuStingg-partsoft mzuz'hinves"or.v appliances.' When extremenernessi.of 4 adjustment is required an," adjunct; is:`

- made. to the nut containing several radial slots as herein described.Inthisspeciicm tion the word along is'used'to. deseribe theA directionfrom screwed endfoff bolt toward its head.

The invention is applicable to heavy parts.

of machines `aswell asbolts and' portableparts to which the termjis morecommonly applied.

In order that my invention may be` full-yi understood I will describefthesame with which-'- Y v Figure l isa top view of a hexagonnut' washeraccording-t'o'thisinvention. c

Fig.- 2 is section-al view of same throughv its diameter. v

Fig. '3 isl an isometrical View of two reference to theaccompanyingfdrawings in washer lcaps n situ one showing the approgri:Avmately annular groove around the nut and the Iturned in parts 'of washerwhich clutch the groove edge of the nut.

Fig. 4 is a view of a nut which has an adjunct the face of whichcontains a numberV ,of Fig. 7.

Fig. 9 is an elevation and Fig. 10 atop View of bolt with ysquared sidesand cap. washer havingv squared sides to its interior aperture..

Figs. 11 and 12 are views of a bolt'with one side of`its threaded endsquared and cap washer corresponding thereto. Y

F.igs.' 13 and 14 show a vbolt with central liat sided groove and capwasher corresponding thereto.

'In the'drawings a hexagon nut is shown but the invention appliesequally to other kinds of nuts. The cap washer is necessarily made tosuit the nutand to be used with thesame.

I, The cap washer 1 ttingv over the nut will now be described.V Ithasahole to corre'spond with the bolt and' nut 25 but contain- 'ing a detentmember 4 for the purpose here- The washeris made Y inafter described. Ylarger than the nut and is bent down in flapsv which may be of variousshapes suoli as 5-6 so as to clutch the nut. The cap l Washer will haveas inany'laps as there are sides to thenut. Two of the flaps 6 are eX-tended farther and bend or turn under into the groove 14 made in thenut. Instead of a groove the nut may be recessed kas sho-wn in Fig. 9and the flaps turned, under the edge as at 7. In irOperation the bolt orbutt and the nutare placed in their required position.

' The cap washer which is constructed of durable suitable material suchasspring steel is placed over the 'nut yand simply pushed home andturned slightly by Vwhich the detent. 4- enters the groove 8 in thebold-,S9 and I, the bolt and nut are thereby secured land held andpreventedfrom loosening; yThe cap washer-is made of Size and temper suchas to enable it in or'dinarysiz'es to be easily pushed down into place.It can be readily removed by inserting the ends of fiat tongs under theprolonged 'flanges and thus slipping them oli-l'. YIn larger machineparts-to which `aswell as portableparts the invention is applicable-thecap` washer is made of thicker material and supplementary means may beemployed for `placing and removing when such may be found desirable.

In Figs. 4 to S the forinofv capvwasher1` 'lug-detent -i'nember adapted"tov .ei'iga ,e longitudinal groove in the bolt or;v shaft; such sidekipssuch as heretofore referred to, but

Y after being placed in operative position is held and secured bythe'flanges o-r lugs 10' each of which passes over one of the radialslots'12, then bendingunder into the groove or recess 14,"the end of thelugs being e'lon{Y gated for convenient.manipulation in placing andremoving. After the nut has been adjusted on the bolt to the desiredtightness the washer -is pushed hometo its position as shown inFig. 3. iThe detent.4 enters the Where instead iii teria- 'nuata Yof 65- groove 8and the lugs 10 engage the slots 12 f i so that Ithe nut'is securedinvits positiononV the bolt and loosening is prevented.

In Figs. 9 and 10 there is illustrated a cap washer or" another`modified Viorm.- 'Inv lieu'of the-groove 8 and detent 4 the screw partof the bolt kris formed Vl with -fiattenedsides 18. .There are four inthe illustration Y Y but there vmight beA a 'less number. VThe washer isalso formed with four flat sides to correspond with 18.V The ywasher isretainedl on the nut in the sameA manner as described Y with referenceto Figs. 1 and-2i 4Itsint'erior VE four flat` sides are dimensionvtopass easily.. over the bolt 9. vThe bolt engages the thread ofthe `nutwith its rounded portions V20. v The'washerby means of its yflat sidesengages theflat sides of the bolt andjsecurely" holds the sameandprevents loosening. The

washer is placed and removedin the manner `v before described. recess 25aiiords means? forl the ends of flaps to be turnedthereunder to clutchthe nut. v

In Figsqll and 12 the bolt 9'is formed with one vflattened side and thecap washer l with a. flattened side 22eXtended either Y upwardly ordownwardly. Other: parts of'V the cap washer arefformed'as-hereinbeforeY 'f Y 105Y In Figs. 13 andf14fthe flattened portion of described and asillustrated. f A

the bolt is provided-by meansfof a slot cut fdiametrically'therethroughas lat 23 and the I washer'l is provided with a bar 24 whichr Y engageswith the slot and holdsl the ynut Vsecurelv 'in its Vvposition'onthebolt `and prevents loosening. .Y Y. Y By means' ofthis invention thenut vcan be adjusted to almost any degree'.A of lfineness;

Where eXtreme .Y ineness VIV isi required many ii5 grooves or faces orVslots' may tak'ethe'placef' of or be addedv tothe ordinary` sides ofthenut which have usually from fourto'eig'htVV sides. `By'the above/meansthere can be obtained twelvefor more gradations.

I claim; 1. A detent capYV washer Vof spring 'plate f steel or metal'adapted tosur'round a boltor shaft and having a Hat inwardly er'tendingY cap washer having exterierl'y two'gripping lugs, said lugs extendingVdownwairvglly'and f inwardly and then curved outward and adapted toengage and grip tWo of a plurality of recesses formed in or upon a nutsubstantially as described and illustrated.

2. In a nut lock, a bolt having a longitudinal groove, a nut on the boltand having radial slots in its upper face and recesses in its sides, anda cap Washer of spring inaterial and formed With an inwardly extendinglug for engaging the groove of the bolt and two lugs for engaging theslots and recesses of the nut, said lugs extending down- Wardly andinwardly and then curved out- Wardly.

In Witness whereof I have hereunto set 15 my hand at Perth, in the Stateof Western Australia, this fifteenth day of January 1918, in thepresence of tWo subscribing Witnesses.

ROBERT HORWOOD FEWSTER.

7itnesses E. TINDAL, J M. TURNER.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

